Added latency to api gateway logs.

Author: ayeshalshukri1-nhs

infrastructure/stacks/api-layer/api_gateway.tf

@@ -56,7 +56,7 @@ resource "aws_api_gateway_stage" "eligibility-signposting-api" {
   # A subscription filter (see csoc_log_forwarding.tf) forwards these logs to CSOC
   access_log_settings {
     destination_arn = module.eligibility_signposting_api_gateway.cloudwatch_destination_arn
-    format = "{ \"requestId\":\"$context.requestId\", \"ip\": \"$context.identity.sourceIp\", \"caller\":\"$context.identity.caller\", \"user\":\"$context.identity.user\", \"requestTime\":\"$context.requestTime\", \"httpMethod\":\"$context.httpMethod\", \"resourcePath\":\"$context.resourcePath\", \"status\":\"$context.status\", \"protocol\":\"$context.protocol\", \"responseLength\":\"$context.responseLength\", \"accountId\":\"$context.accountId\", \"apiId\":\"$context.apiId\", \"stage\":\"$context.stage\", \"api_key\":\"$context.identity.apiKey\" }"
+    format = "{ \"requestId\":\"$context.requestId\", \"ip\": \"$context.identity.sourceIp\", \"caller\":\"$context.identity.caller\", \"user\":\"$context.identity.user\", \"requestTime\":\"$context.requestTime\", \"httpMethod\":\"$context.httpMethod\", \"resourcePath\":\"$context.resourcePath\", \"status\":\"$context.status\", \"protocol\":\"$context.protocol\", \"responseLength\":\"$context.responseLength\", \"accountId\":\"$context.accountId\", \"apiId\":\"$context.apiId\", \"stage\":\"$context.stage\", \"api_key\":\"$context.identity.apiKey\", \"responseLatency\":\"$context.responseLatency\",  \"integrationLatency\":\"$context.integrationLatency\" }"
 
   }